[sdiy] Voyager inside pics

[Tim Parkhurst]

Actually, there are analog switches with better specs and higher voltage
handling capability. 

http://dkc3.digikey.com/PDF/T052/0420.pdf

http://rocky.digikey.com/WebLib/Analog%20Devices/Web%20Data/ADG201A_202A.pdf

You can find more by searching for DG201 and DG211. 

They ARE more expensive (of course), but they work very well. It wouldn't
surprise me at all if these (or something similar) were used in the Voyager.
Also, did you see all those bypass caps on the digital board? Wow!

Peter, is there a better method than CMOS analog switches? I was thinking
I'd use one of the commercially available analog multiplexers, but that is
still (electrically) very similar. Then again, maybe I'm unclear on the
concept. Nah, that never happens... ;)


Tim (better specs) Servo

"Imagination is more important than knowledge." - Albert Einstein

***************************************************
> -----Original Message-----
> From: Roy J. Tellason [mailto:rtellason at blazenet.net]
> Sent: Tuesday, July 05, 2005 8:58 PM
> To: SynthDIY
> Subject: Re: [sdiy] Voyager inside pics
> 
> On Tuesday 05 July 2005 03:54 pm, Peter Grenader wrote:
> > On top of that, he used CMOS analog switches to inject/record the
> pot and
> > switch settings for the whole beast.
> >
> > - P
> 
> Hm.  I thought of doing that back in 1977 or so,  but the parts I was
> familiar
> with wouldn't handle a -15 - +15 swing that some controls used...
> 
> > Tim Parkhurst wrote:
> > > Anybody wanna see the insides of a Moog Voyager?
> > >
> > > http://till-kopper.de/voyager.html
> > >
> > > No, it's not mine. None of the boards are removed, but still an
> > > interesting look inside. Looks like it's ALL through hole. Yipes!
> I would
> > > have thought there'd be more SMT in there.
> > >
> > >
> > >
> > > Tim (yes, I think SMT is neat) Servo
> > >
> > > "Imagination is more important than knowledge." - Albert Einstein
> 
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